Identify the first packet that contains application data? What is the sequence number used in the first byte of application data sent from the TCP client to the TCP server?

Question

What will be an ideal response?

Answer 1

Sequence number is 811761929.
Frame 4
```
(99 bytes on wire, 99 bytes captured)
Arrival Time: Aug 23, 2003 04:21:18.856867000
Time delta from previous packet: 0.003425000 seconds
Time relative to first packet: 0.003763000 seconds
Frame Number: 4
Packet Length: 99 bytes
Capture Length: 99 bytes
Ethernet II, Src: 00:06:5b:4b:e0:dd, Dst: 00:06:5b:4b:e1:da
Destination: 00:06:5b:4b:e1:da (00:06:5b:4b:e1:da)
Source: 00:06:5b:4b:e0:dd (00:06:5b:4b:e0:dd)
Type: IP (0x0800)
Internet Protocol, Src Addr: 10.0.5.11 (10.0.5.11), Dst Addr: 10.0.5.22 (10.0.5.22)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x10 (DSCP 0x04: Unknown DSCP; ECN: 0x00)
0001 00.. = Differentiated Services Codepoint: Unknown (0x04)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0 Total Length: 85
Identification: 0x90a4
Flags: 0x04
.1.. = Don't fragment: Set
..0. = More fragments: Not set
Fragment offset: 0
Time to live: 64
Protocol: TCP (0x06)
Header checksum: 0x8bce (correct)
Source: 10.0.5.11 (10.0.5.11)
Destination: 10.0.5.22 (10.0.5.22)
Transmission Control Protocol, Src Port: 3112 (3112), Dst Port: 23 (23), Seq:

811761929, Ack: 792841442, Len: 33

Source port: 3112 (3112)
Destination port: 23 (23)
```
Sequence number: 811761929
```
Next sequence number: 811761962
Acknowledgement number: 792841442
Header length: 32 bytes
Flags: 0x0018 (PSH, ACK)
0... .... = Congestion Window Reduced (CWR): Not set
.0.. .... = ECN-Echo: Not set
..0. .... = Urgent: Not set
...1 .... = Acknowledgment: Set
.... 1... = Push: Set
.... .0.. = Reset: Not set
.... ..0. = Syn: Not set
.... ...0 = Fin: Not set
Window size: 5840
Checksum: 0xc3a1 (correct)
Options: (12 bytes)
NOP
NOP
Time stamp: tsval 1577386, tsecr 1577192
```
Telnet
```
Command: Do Encryption Option
Command: Will Encryption Option
Command: Do Suppress Go Ahead
Command: Will Terminal Type
Command: Will Negotiate About Window Size
Command: Will Terminal Speed
Command: Will Remote Flow Control
Command: Will Linemode
Command: Will New Environment Option
Command: Do Status
Command: Will X Display Location
```